Traveler

...The former are called winter birds and the latter summer birds. In addition to these, other shorebirds such as Latham's Snipe, Golden Plover, and Great Sharptail, which breed in the Arctic and Siberian regions and migrate to Australia to spend the winter, stop in Japan twice a year, in spring and autumn, and are called travellers. Also, birds that do not normally live or migrate here but happen to visit during a storm or other fortuitous occasions are called strayers.

*Some terminology explanations that mention "traveler" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…前者を冬鳥winter bird，後者を夏鳥summer birdという。さらにこれらのほかに，北極圏やシベリア地方で繁殖し，オーストラリア方面まで渡って越冬するオオジシギをはじめトウネン，ムナグロ，ダイゼンなどシギ･チドリ類は，春と秋の年2回日本に立ち寄るので，これらを旅鳥travelerと呼んでいる。またふだんは生息も渡来もしないが，暴風その他の偶然の機会にたまたま訪れるものを迷鳥strayerと呼ぶ。…

※「traveler」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報